<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<h1>注册页面</h1>
<form action="">
    <input type="text" name="username" @blur="check()">{{info}}<br>
    <input type="text" name="password"><br>
    <input type="text" name="nick"><br>
    <input type="button" value="注册" @click="reg()">
</form>
<!--引入vue框架-->
<script src="https://cdn.jsdelivr.net/npm/vue@2/dist/vue.js"></script>
<script src="https://cdn.bootcdn.net/ajax/libs/axios/0.21.1/axios.min.js"></script>
<script>
    let v=new Vue({
        el:"form",
        data:{
            info:""
        },
        methods:{
            check:function(){
                let data=new FormData(document.querySelector("form"))
                axios.post("/check",data).then(function (response) {
                    v.info=response.data==1?"用户名可用":"用户名已存在!";

                })
            },
            reg:function () {
                let data=new FormData(document.querySelector("form"))
                axios.post("/reg",data).then(function (response) {
                    if (response.data==1){
                        alert("注册成功")
                        //显示回首页 location
                        location.href="/";
                    }else{
                        alert("用户名已存在!")
                    }
                })
            }
        }
    })
</script>
</body>
</html>